Fix Power Automate FLOW error - InvalidTemplate Unable to process template language expressions in action

⛔️ PROBLEM

You receive error "InvalidTemplate. Unable to process template language expressions in action ..." when triggering a FLOW from PowerApps form to send an email, or even without PowerApps in some cases.
The error may also seem intermittent sometimes.

You may try deleting and re-adding the erroring Outlook (email) action, removing references to any properties, changing the email address, but nothing works.

⛏️ How to fix InvalidTemplate error with FLOW

1. Export the Flow.
2. Import the Flow with a different name.
3. Delete the old Flow.
4. Re-add the new Flow to the PowerApps Flow option
5. Run the Flow again to test.

⚡️ Send_an_email_to_accounts action

InvalidTemplate. Unable to process template language expressions in action 'Send_an_email_to_accounts' inputs at line '1' and column '2575': 'The template language expression 'json(decodeBase64(triggerOutputs().headers['X-MS-APIM-Tokens']))['$connections']['shared_office365_1']['connectionId']' cannot be evaluated because property 'shared_office365_1' doesn't exist, available properties are 'shared_approvals, shared_office365, shared_sharepointonline'.

⚡️ Get_file_content_using_path_-_report action

InvalidTemplate. Unable to process template language expressions in action 'Get_file_content_using_path_-_report' inputs at line '1' and column '2286': 'The template language expression 'json(decodeBase64(triggerOutputs().headers['X-MS-APIM-Tokens']))['$connections']['shared_sharepointonline']['connectionId']' cannot be evaluated because property 'shared_sharepointonline' doesn't exist, available properties are 'shared_office365users, shared_sharepointonline_1, shared_approvals, shared_office365, shared_planner, shared_office365_1'. Please see https://aka.ms/logicexpressions for usage details.'.

⚡️ Send_me_a_mobile_notification action

InvalidTemplate. Unable to process template language expressions in action 'Send_me_a_mobile_notification' inputs at line '1' and column '2084': 'The template language expression 'json(decodeBase64(triggerOutputs().headers['X-MS-APIM-Tokens']))['$connections']['shared_flowpush']['connectionId']' cannot be evaluated because property 'shared_flowpush' doesn't exist, available properties are 'shared_sql'. Please see https://aka.ms/logicexpressions for usage details.'.

⚡️ Send_an_email action

InvalidTemplate. Unable to process template language expressions in action 'Send_an_email' inputs at line '1' and column '2514': 'The template language expression 'json(decodeBase64(triggerOutputs().headers['X-MS-APIM-Tokens']))['$connections']['shared_office365']['connectionId']' cannot be evaluated because property 'shared_office365' doesn't exist, available properties are 'shared_sharepointonline'. Please see https://aka.ms/logicexpressions for usage details.'.

⚡️ Create_item_in_Functioneringsgesprekken action

InvalidTemplate. Unable to process template language expressions in action 'Create_item_in_Functioneringsgesprekken' inputs at line '1' and column '1973': 'The template language expression 'json(decodeBase64(triggerOutputs().headers['X-MS-APIM-Tokens']))['$connections']['shared_sharepointonline']['connectionId']' cannot be evaluated because property 'shared_sharepointonline' doesn't exist, available properties are ''. Please see https://aka.ms/logicexpressions for usage details.'.

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